<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog"
            >添加分类</el-button
          >
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        border
        class="treeTable"
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            v-if="scope.row.cat_deleted === false"
            class="el-icon-circle-check"
            style="color: green"
          ></i>
          <i v-else class="el-icon-circle-close" style="color: red"></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag v-if="scope.row.cat_level === 0" size="mini">一级</el-tag>
          <el-tag
            v-else-if="scope.row.cat_level === 1"
            type="success"
            size="mini"
            >二级</el-tag
          >
          <el-tag v-else type="warning" size="mini">三级</el-tag>
        </template>
        <!-- 操作  slot-scope="scope" -->
        <template slot="opt">
          <el-button type="warning" size="mini" icon="el-icon-edit"
            >编辑</el-button
          >
          <el-button type="danger" size="mini" icon="el-icon-delete"
            >删除</el-button
          >
        </template>
      </tree-table>
      <!-- 分页 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>

    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
    >
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateForm"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name" />
        </el-form-item>
        <el-form-item label="父级分类">
          <el-cascader
            v-model="selectedKeys"
            :options="parentCateList"
            expand-trigger="hover"
            :props="cascaderProps"
            @change="parentChange"
            style="width:100%"
            clearable
            change-on-select
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCateDialogVisible = false"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 商品分类数据列表
      cateList: [],
      // 查询条件
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      addCateDialogVisible: false,
      // 添加分类表单
      addCateForm: {
        cat_name: '',
        // 父级id
        cat_pid: 0,
        // 分类等级
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [{ required: true, message: '请输入分类名称', trigger: blur }]
      },
      parentCateList: [],
      // 级联选择器的配置对象
      cascaderProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 已选择的分类数组id
      selectedKeys: []
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表分类失败')
      }
      console.log(res.data)
      this.cateList = res.data.result
      this.total = res.data.total
    },
    /** 监听pagesize改变 */
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    /** 监听pagenum改变 */
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    /** 获取父级分类列表 */
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取父级列表分类失败')
      }
      this.parentCateList = res.data
      console.log(this.parentCateList)
    },
    /** 监听显示添加分类对话框 */
    showAddCateDialog() {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    /** 选择项发生变化 */
    parentChange() {}
  }
}
</script>

<style lang="less" scoped>
.treeTable {
  margin-top: 15px;
}
</style>
